/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.servicecomb.swagger.converter;

import java.util.Map;

import org.apache.servicecomb.swagger.generator.core.utils.ClassUtils;
import org.springframework.util.StringUtils;

import com.fasterxml.jackson.databind.JavaType;

public abstract class AbstractConverter implements Converter {
  protected abstract Map<String, Object> findVendorExtensions(Object def);

  protected abstract JavaType doConvert(SwaggerToClassGenerator swaggerToClassGenerator, Object def);

  @Override
  public JavaType convert(SwaggerToClassGenerator swaggerToClassGenerator, Object def) {
    Map<String, Object> vendorExtensions = findVendorExtensions(def);
    String canonical = ClassUtils.getClassName(vendorExtensions);
    if (!StringUtils.isEmpty(canonical)) {
      try {
        return swaggerToClassGenerator.getTypeFactory().constructFromCanonical(canonical);
      } catch (Throwable e) {
        // ignore this
      }
    }

    return doConvert(swaggerToClassGenerator, def);
  }
}
